Vancouver, Canada, hosts the 55th International Astronautical Congress (IAC) from 4 to 8 October this year. The Congress is being organised by the International Astronautical Federation (IAF) together with the International Academy of Astronautics (IAA) and the International Institute of Space law (IISL).
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http://www.esa.int/esaCP/SEM4T5ADFZD_index_0.html